to import you should go in the sub-tool tab and click on the small icon on the top-right that opens the menu and choose "import sub-tool"

I did those in Clip Studio Paint, that is the japanese version of Manga Studio 5, and it has some updates more if confronted with MS5, so I'm not 100% sure those will work in Manga Studio 5, if you manage to try it can you please tell me? thanks!

Thank you so much! I love these brushes, they are the only brushes that I've used that really feel like painting with oil. This will come in very handy, since I learned how to paint with oil some time ago and I never managed to get the same feeling with digital painting. I think this will help me improve my semi realism!

to import you should go in the sub-tool tab and click on the small icon on the top-right that opens the menu and choose "import sub-tool", to customize brushes you need to hav a brush selected and then go to the "tool properties" tab and click on the small icon that resembles a wrench, that will open the window with all the available options for brushes.